GM Service Manual Online
For 1990-2009 cars only

Visual Inspection

  1. Before the performing the load test, visually inspect the battery for obvious damage, such as a cracked or broken case.
  2. Repair the cause of any damage or replace the battery. Refer to Battery Replacement .

Hydrometer Check


    Object Number: 1023  Size: SH
  1. If the green dot is visible (A), perform the load test. Refer to Battery Load Test .
  2. If the green dot is not visible (B), charge the battery. Refer to Battery Charging .
  3. If the dot is clear or yellow (C), replace the battery. Refer to Battery Replacement .